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20460 Robwhiteley (1999 LO28)
Classification: Amor [NEO]          SPK-ID: 2020460
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 228 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4120833904473305 3.5283e-08  
a 1.876650523104516 4.384e-09 au
q 1.103314012858851 6.5966e-08 au
i 33.9417571186501 6.9292e-06 deg
node 280.0728798067037 7.7218e-06 deg
peri 283.6692431596215 1.1543e-05 deg
M 90.15696020444049 1.1936e-05 deg
tp 2458765.336295626607
(2019-Oct-08.83629563)
3.0584e-05 TDB
period 939.0171694170717
2.57
3.2904e-06
9.009e-09
d
yr
n .3833795714549956 1.3434e-09 deg/d
Q 2.649987033350181 6.1906e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1253  
   data-arc span      23962 days (65.60 yr)  
   first obs. used      1954-12-30  
   last obs. used      2020-08-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47291  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-08 05:57:49  

Additional Information
 Earth MOID = .329679 au 
 Jupiter MOID = 2.99872 au 
 T_jup = 3.681 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO395199  
diameter diameter 2.716 km 0.585 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
rotation period rot_per 2.7209 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2017) http://www.asu.cas.cz/~ppravec/neo.htm]
[Warner, B.D. (2018) Minor Planet Bull. 45, 19-34.]
geometric albedo albedo 0.199   0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  

20460 Robwhiteley           Discovered 1999 June 13 by the Catalina Sky Survey.
Robert J. Whiteley (b. 1971) is a member of the University of Hawaii Aten Survey and the Catalina Sky Survey. He has also done research into the rotational properties of small, rapidly spinning minor planets and the taxonomic classification of near-earth asteroids.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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